A nice touch is the INDUSTRIAL MRO brand, and the terminals feel clean and well aligned.
E-MAX 7792301 AUXILIARY VOLTAGE RELAY 129V UNMP
What stands out about the MICTUN clean font, which makes quick identification a breeze.
A nice touch is the consistent coil resistance on Action relays, which simplifies matching with drivers.
You will find that the Emergency Stop Module works well with both new and older relay systems.
The 2pcs - 4pin relays feel sturdy, and having two on hand reduces project downtime.